摘要
针对永磁同步电机传统开环V/F控制方式的不稳定现象,提出了一种改善V/F控制系统稳定性的控制方法。通过分析永磁同步电机稳态矢量图,得到含有电阻压降补偿的给定电压来替代传统人为设定的V/F曲线;根据瞬时功率理论,通过探测无功功率的快速变化量对频率进行反馈,从而实现稳定控制。试验结果表明该方法简单有效,能明显改善控制系统的不稳定现象。
Unstable phenomena of the open-loop V/F controlled PMSM, and a novel approach of improving stable V/F controlled PMSM is proposed. In this paper, through analyzing the PMSM steady state vector diagram, the voltage reference includes the voltage drop of stator resistance compensation instead of the V/F curves. For stability control, used frequency feedback which is based on the definition of instantaneous complex power. Experiment results demonstrate that it can suppress the oscillations of the rotor speeds effectively.
出处
《机电工程技术》
2012年第10期28-30,47,共4页
Mechanical & Electrical Engineering Technology
